void main(List<String> args) {
  int selectFlag = 2;

  if (selectFlag == 1) {
    print("选择鸿蒙");
  } else if (selectFlag == 2) {
    print("选择Java");
  } else if (selectFlag == 3) {
    print("选择flutter");
  } else {
    print("其他");
  }

   String username="梅川酷子";
   String judge= username.length>3?"外国人":"中国人";

   print(judge);

  switch(selectFlag){
    case 1:
      print("选择鸿蒙");
    case 2:
      print("选择Flutter");
    default:
      print("其他");


   int year=0;
   int allYear=20;

   while(year <= allYear){
     if(year==2){
      break;
     }
     year++;

   }
   print("当你工作了"+year.toString()+"跳槽");

  }





}
